Bump django from 2.2.10 to 2.2.13 in /requirements

requirements/base.txt

@@ -4,6 +4,6 @@
 #
 #    pip-compile --output-file requirements/base.txt requirements/base.in
 #
-django==2.2.10
+django==2.2.13            # via -r base.in
 pytz==2017.3              # via django
 sqlparse==0.3.0           # via django

requirements/dev.txt

@@ -12,7 +12,7 @@ certifi==2017.11.5        # via requests
 chardet==3.0.4            # via requests
 click==6.7                # via pip-tools
 coverage==4.4.2           # via pytest-cov
-django==2.2.10
+django==2.2.13            # via -r base.txt
 docutils==0.14            # via sphinx
 execnet==1.5.0            # via pytest-cache
 first==2.0.1              # via pip-tools
@@ -21,19 +21,19 @@ imagesize==0.7.1          # via sphinx
 jinja2==2.10              # via sphinx
 markupsafe==1.0           # via jinja2
 pep8==1.7.1               # via pytest-pep8
-pip-tools==1.11.0
+pip-tools==1.11.0         # via -r dev.in
 pluggy==0.6.0             # via pytest
 py==1.5.2                 # via pytest
 pygments==2.2.0           # via sphinx
 pytest-cache==1.0         # via pytest-pep8
-pytest-cov==2.5.1
-pytest-pep8==1.0.6
-pytest==3.3.0
-pytz==2017.3
+pytest-cov==2.5.1         # via -r dev.in
+pytest-pep8==1.0.6        # via -r dev.in
+pytest==3.3.0             # via -r dev.in, pytest-cache, pytest-cov, pytest-pep8
+pytz==2017.3              # via -r base.txt, babel, django
 requests==2.18.4          # via sphinx
 six==1.11.0               # via pip-tools, pytest, sphinx
 snowballstemmer==1.2.1    # via sphinx
-sphinx==1.6.5
+sphinx==1.6.5             # via -r dev.in
 sphinxcontrib-websupport==1.0.1  # via sphinx
-sqlparse==0.3.0
+sqlparse==0.3.0           # via -r base.txt, django
 urllib3==1.22             # via requests

requirements/production.txt

@@ -4,6 +4,6 @@
 #
 #    pip-compile --output-file requirements/production.txt requirements/production.in
 #
-django==2.2.10
+django==2.2.13
 pytz==2017.3
 sqlparse==0.3.0